Interstate 15 in Montana
Section of Interstate Highway in Montana, United States / From Wikipedia, the free encyclopedia
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This article is about the section of Interstate 15 in Montana. For the entire route, see Interstate 15.
In the U.S. state of Montana, Interstate 15 (I-15, additionally named as the First Special Service Force Memorial Highway from Helena to the Alberta, Canada border, where it continues on into Canada retaining that designation) continues onward from Idaho for nearly 400 miles (640 km) through the cities of Butte, Helena, and Great Falls, intersecting with I-90, I-115, and I-315. I-15 reaches its northern terminus at the international border with Alberta, Canada.
Quick Facts Route information, Length ...
First Special Service Force Memorial Highway | ||||
Route information | ||||
Maintained by MDT | ||||
Length | 396.030 mi[1] (637.349 km) | |||
NHS | Entire route | |||
Major junctions | ||||
South end | I-15 at the Idaho state line | |||
Major intersections | ||||
North end | Hwy 4 at the Sweetgrass-Coutts Border Crossing near Sweetgrass | |||
Location | ||||
Country | United States | |||
State | Montana | |||
Counties | Beaverhead, Madison, Silver Bow, Jefferson, Lewis and Clark, Cascade, Teton, Pondera, Toole | |||
Highway system | ||||
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I-15 joins with I-90 and makes a junction with a short, one-mile (1.6 km) spur route I-115 in Butte.